hagey



J. C. HAGEY.

DEVICE FOR CONTROLLING AIR PRESSURE.

APPLICATION FILED JAN. 20,19I7.

Patented Nov. 23, 192R,

4 SHEETSSHEET I.

J. C. HAGEY.

DEVICE FOR CONTROLLING AIR PRESSURE.

APPLICATION FILED JAN. 20, 1917.

' 1 359 69 Patent-ed Nov. 23, 192% 4 SHEETS-SHEET 2- .I. C. HAGEY.

DEVICE FOR CONTROLLING AIR PRESSURE.

APPLICATION FILED JAN. 20, 1917.

1,359,69 Patented Nov. 23, 1920..

4 SHEETSSHEET 3.

J. C. HAGEY.

DEVICE FOR CONTROLLING AIR PRESSURE.

APPLICATlON FILED JAN. 20, 1917.

Patented Nov. 23, 1920'.

4 SHEETS-SHEET 4.

,fy4. Z 4

UNITE h'iATESi PATENT OFFICE.

JAMES CLARKE HAGEY, OF CHICAGO, ILLINOIS, ASSIGNOB, TO THE CABLE COMPANY, OF CHICAGO, ILLINGIS, A CORPORATION OF ILLINOIS.

DEVICE FOR CONTROLLING AIR-PRESSURE.

Specification of Letters Patent.

Patented Nov. 23, 1920.

Application filed January 20, 1917. Serial No. 143,463.

1 0 all whom it may concern Be it known that I, JAMns CLARKE HAGEY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in'Devices for Controlling Air-Pressure, of which the following is a full. clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to devices for controlling air-pressure and, more specifically, to devices for controlling the air-pressure in the action of automatic musical instruments.

One of the objects of my invention is to provide such a device which will be efficient in operation and simple in construction.

A. further object of my invention is to provide an improved device of the character indicated by means of which the degree of rarefaction of the air in the action of an automatic musical instrument may be varied, either automatically or manually,

and which will be prompt and reliable in action under the varying conditions found in practice.

Further objects will appear from the detailed description to follow and from the appended claims.

In the drawings, in which one form of my invention is shown,

Figure 1 is a front elevation of a playerpiano embodying myinvention, parts being broken away to show the interior construction;

Fig. 2 is an elevation of one side of the air 4 pressure controlling mechanism, parts being broken away to show the interior construction Fig 3 is an elevation of the other side of the mechanism of F in. 2, parts beingremoved to show the interior construction;

Fig.4 is an elevation of a manually-op erable valve for controlling the air-pressure, parts being broken away;

Fig. 5 is a section, on the line 5-5 of Fig. 4;

Fig. 6 is a vertical transverse section of a valve-action, on the line 6-6 of Fig. 2;

Fig. 7 is a horizontal section, on the line 7-7 of Fig. 3;

Fig. 8 is a horizontal section, on the line 8---8 of Fig 3;

F ig. 10 is a horizontal section, on the line 10-10 of Fig. 3;

Fig. 11 is a vertical section, on the line 111l of Fig. 3;

Fig. 12 is a vertical section, on the line 1212 of Fig. 1, showing the manuallyoperable levers tor controlling the air-pressure;

Fig. 13 is an enlarged detailed view, show ing a spring for frictionally holding one of the manually-operable levers in position.

Referring now to the drawings in detail, the player-piano shown is of the pneumatic type, comprising a casing 15; selector-mechanism 16, located in the upper part of the casing, for automatically controlling the various parts; an air-pump 17 and a motor 18, located in the lower part of the casing, for producing rarei action of air in the action and motor wind-chests (not shown); and air-pressure-contr0lling mechanism 19, for controlling the pressure of the air in the action wind-chest.

The air pump 17 may be of any suitable type. it withdraws air from the action wind-chest through the communicating conduits 20 and 21.

The pressure-controlling mechanism 19 controls the air-pressure in the action windchest by placing the conduit 21 in communication with the atmosphere through the conduit 22. This pressure-controller 19 comprises a series of chambers 23, 24, 25, 26 and 27, in communication with each other, respectively, through ports 28, 29, 30 and 31; valve-mechanisms 32, 33. 34 and 35 for controlling the ports 28, 29, 30 and 31, respectively; ports 36, 37, 38, 39 and 40 for admitting air to the chambers 23, 24., 25, 26 and 27, respectively; and air-admissioncontrolling mechanisms 41, 42, e3, 44 and 45 4 for con roll n he admission of air through the ports 36. 37, 38, 39 and 40, respectively. The lower chamber 27 is in communication with the conduit 22 through a port 45* 9).

The valve-mechan sms 32, 33, 34 and 35 are substantially alike. Each comprises a valve proper 46 for closing its port, and a pneumatic 47, mounted on a support 48, for ac uating the valve. The valve-mechanisms 32, 33, 34 and 5 are connected with primary valvouctions in the primary valve neumatics 57 corresoondiir ports 69, 70, 71 or 72.

chest 19 through the con 53, respectively. -19 is in communico through the conduit 54. actions may be of any su epi..-- veheable eonstructim.

(Fig. 6). Each comprises a do o valve 55, controlling a p 1st. "e l fl one of the conduits 50, 51, and a valve diaphragni-pneumatic o IOXL The chambers 58, under the d u iragmto the mechanisms 35, IQSPGCillv are in col iunication vith ports in the iuits '30, 61, 02

tracker through cor 63, respectively, leading to the c junction-and-valve-blocl; 0e, and conduits 65, 66, 67 and 68, leading fron'i the junction-bio tracker z 1, and

The valve .olocl: Set is provided with ports 69, 70, 71 and 72, which communicate with the conduits G0, 61, 02 and 63, resg iectively, and are controlled by a slide-valve 73, which can be moved to bring an opening 7 itherein into registration with any one of the This slide-valve 7 5 is controlled by means of a manuallyoperable lever 75, to which it is connected by means 01 a rod (Figs. 1, at and The slide-valve 73 is held in place and guided in its movement by means of a guide-rod 77, which engages a groove 7 8 in the slide valve 73.

Each of the meeaanisms 1-1, 4 2, 4 .3, is} and 45 for controlling the admission oi air comprises a bellows 79, having its interior in communication with one of the p rrs s7, movable leaf, a port-block 81 having a passage S2 in communication with the port 80, knife-valve 83. for controlling the flow of airinto the passage 82, and an adjustable spring-mechanism 84 tending to hold the bellows 79 in open or expanded position.

The knife-valve 83 is pivotally mounted on a screw or post 85 and is held in place against the port-block 81 by means ct a spring-member 8-6, which is also pivotally mounted on the screw 85 and s ld slightly compressed, against the l i the bearing of the screi One extremity of the sprin -niember 86 gages a notch 87' in the knife-valve 83 adjacent the free end of the valve, and the other extremity rests the surface of the knife-valve adjacent the screw 853 (as indicated at 88), the intermediate portion being provided with an aperture throu which the screw extends. The spriir member 86 and the knife-valve 83 are so constructed and proportioned that tighte i of screw 85 places slight end-compression upon the part of the swing-member extending between the screw 85 and the notch 87,

and

so that that part of the springmember re 38, 39 or L0 and having a port in its" acts laterally against the screw and, on the knife-valve, in a direction downwardly and away from the head of the screw 85. The other end of the spring-member is so shaped and proportioned that it reacts upwardly against the head of the screw 85 and downwardly against the knife-valve 8 (En account of the compression in that part of the spring between the screw 85 and the notch 87, the free outer end of the knifevalve is held in proper engagement with the port-block 81.

Each knife-valve 83 has an arm or extension 89 which bears against an adjustable fulcrum-member 90. The fulcrummember 90 comprises a rock-shaft 91 provided with a plurality of bearing-members 92, one for engagement with each of the arms or extensions 89 of the valves 83. Each of the arms or extensions 89 is held in engagement 'ith its corresponding bearingmember 92 by means of a leaf-spring 93, secured to the respective arm 89 and hearing against a housing 9% which extends over and incloses the air-controlling mechanisms 11, 42, 43, 4st and 45.

The fulcrum-member 90 may be adjusted to vary the position of the bearingmembers 92 by means of a manually-operable lever 95 (Figs.- 1, 12 and 13), connected by means of a link 96 to an arm 97 at the upper end of the fulcrum-member 90. For frictionally holding the lever 95 in any position to which it may be moved, a leaf-spring 98 (Figs. 12 and 13} is secured to the under side oi the hey-bed and bears against a collar 99 secured to the shaft-portion 100 of the lever 95. The pressure of this leafspring 98 against the collar 99 causes the handle-portion 101 of the lever 95 to bear against a friction-plate 102, secured to the hey-bed to hold the handle-portion 101 in any desired position.

Each of the spring-mechanisms 84: for the bellows 79 comprises a pair of leaf-springs .103, one end of each spring of the pair being fixedly secured to the movable leaf of 1 bellows; a yoke-member 104, to which of each of the pair of springs and an adjusting-screw 1 so into a supperting-member 10G, exending through an opening in the yokemember 10%, and held in place with respect thereto by means of a pair of nuts 107. The springs 103 for the diflerent bellows may be made of different effective strengths in various ways, as, by varying the weight of the material used, by varying the number of leaves in the spring, and by varying the manrer of attachment to the bellows. In-

l of, or in addition to, this employment s of different strengths to act upon .1 on; bellows, the bellows may be of relatively dilierent sizes.

Air is admi ted to the housing-94, to supply the air-passages 82 in the port-blocks 81. through a mufiier 108 located beneath the housing 94 (Figs. 3 and 10). This mufiier is in communication with the housing 94 through a port 109, and with the atmosphere through a port 110 which may be covered -with a screenlll. The U-shaped passage 112 of the muffler may be lined with felt 113.

The operation of my improved device is as follows: A suitably perforated music-roll 114 is placed in position in the roll-box 115 and its leader-end is attached to the take-up roll 116. This music-roll 114 is provided with suitable perforations for controlling the sounding of the notes and is also provided with suitable perforations for cooperating with those openings of the tracker 59 which are in communication with the conduits 65, 66, 67 and 68.

If it is desired that the pressure-controller 19 shall be controlled solely by the musicroll 114, the lever 75 is allowed to occupy the position shown in Fig. 1, in which the slide-valve 7 3 closes all of the ports 69, 70, 71 and 72.

The motor 18 is put in operation to actuate the air-pump 17 to withdraw air from the wind-chests of the instrument and produce a rarefaction of the air therein, whereby the striker-pneumatics and rollmotor may be operated.

To control the air-pressure in the action wind-chest, and consequently the loudness or volume with which the notes may be sounded, the pressure-controller 19 is operated to admit air more or less freely into the conduit 22, which communicates with the conduit 21. The freedom with which air is admitted to the conduit 22, through the pressure-controller 19, may be varied by selectively closing any one of the valve-mechanisms 32, 33, 34 or 35.

The air-admission-controlling mechanisms 41, 42, 43, 44 and 45 are so constructed that each requires a different degree of rarefaction of air to cause it to operate to open its valve 83 to admit air to its passage 82. This may be obtained in various ways, such as by the method I have described, 2'. 6., that of opposing the collapse of the bellows 79 of the different controlling mechanisms by springs of relatively different strengths; or by the well-known alternative method I have mentioned, 71. 6., that of employing bellows 7 9 of relatively different sizes. The upper air-admission-controlling mechanism 41 operates under the least degree of rarefaction of air. The air-admission-controlling mechanism 42 requires a somewhat higher degree of rarefaction of air to cause its operation than does the mechanism 41, and so on .down, the mechanism 45 requiring the highest degree of rarefaction of air for its operation. 7

When all of the ports 28, 29, 30 and 31 are open, the upper air-admission-controlling mechanism 41 controls the admission of air to the conduit 22. This air-admissioncontroller 41 operates, under a comparatively low degree of rarefaction of air, to admit atmospheric air through its passage 82. This admission of atmospheric air tends to prevent the ,air in the conduit 21 and, consequently, the air in the action windchest, from being still further rarefied. If air is being admitted to the action windchest in comparatively small quantities, as would be the case when comparatively few notes were being sounded, the operation of the pump 17 tends to cause a higher degree of rarefaction in the action wind-chest and, consequently, in the conduit 22, and this results in a further collapse of the bellows 7 9 of the air-admissionbontroller 41. This collapsing movement of the bellows 79 increases the opening of the valve 83 and allows a freer admission of atmospheric air to the passage 82, thus tending to prevent any higher degree of rarefaction of air in the conduits 22 and 21 and in the action wind-chest. If air is admitted in comparatively large quantities to the action windchest, as would be the case if a comparatively large number of notes were being sounded, it tends to lower the degree of rarefaction of air in the wind-chest and, consequently, in the conduits 21 and 22. This decrease in the rarefaction of air causes the bellows 79 of the controller 41 to eX- pand somewhat to cause the valve 83 to move in a direction to restrict the admission of at mospherie air to the passage 82. This restriction of the admission of atmospheric air tends to prevent a further decrease of the rarefaction of air in the'conduits 22 and 21 and, consequently, in the action wind-chest, The bellows 79 constitutes a chamber having a movable wall, the position of which varies with the de ree of rarefaction of air.

The action of the other air-admission-centrollers 42, 43, 44, and 45 is substantially the same as the operation of the controller 41, except that the controllers 42, 43, 44 and 45 operate under successively higher degrees of rarefaction of air.

If the port 28 is closed, the ports 29, 30, and 31 remaining open, the air-admissioncontroller 42 is brought into operation to control the admission of air to the conduit 22 and, consequently, the degree of rarefaction of air which is maintained in the action wind-chest. This is the condition shown in Fig. 2, in which the flow of air, through the ports 29, 3-0 and 3 to the conduit 22, is indicated by arrows.

'If the port 29 is closed, the ports 30 and 31 remaining open, the controller 43 becomes effective to control the degree of rarefaction of air in the action wind-chest.

If the port 30 is closed, the port 31 re maining open, the controller 44 is brought into operation to control the pressure. This is the condition shown in Fig. 9, in which the flow of air, past the valve 83, through the passage 82, per s 80, 39 and 31, chamber 27,

and port 45 to the conduit 22, is indicated justing the springs 103 to vary the degree of rareiaction of air reg "l to c llapse the bellows 79 to cause the vane" 83 to uncover their respective ports.

The controllers 41, 42, 43, 44 and 45 may be collectively adjusted by means of the fulcrum-member 90, which can be shifted to vary the position of the bearing-men1bers 92 to vary the degree of collapse of the bellows 79 required to cause the valves 83 to open their ports. T ins, ii' th lever 95 is moved to the right, to the position marked Light,

in Fig. 1, the bearing-members will be moved to the position shown in Fig. 8,

which will cause the .valves 83 to open on a comparatively slight degree of collapse ol the bellows 79: while, if the lever is movel to the left, to the position marked Heavy, the bearing-members 92 will be moved to the position shown in Fig. 7, in which the valves 83 will not be opened until the bellows 79 have been collapsed to a comparatively great extent and considerably greater strain has been placed upon the springs 103. Consequently, moving the lever 95 to, the right (Fig. 1) will decrease the volume, and moving it to the left will increase the volume. Since the springs 1.03 for the different bellows 79 are of different strengths, the collective adjustment eilected by means of the fulcrum-member 90 will affect the individual degrees or" air-pressure controlled by the air-admission-controlling mechanisms 41, 42, 43, 44 and 45 differently. To explain further, a shifting of the fulcrum-member 90, to adjust the position of the bearing members 92, will change the opening point of all of the knife-valves 83, and this change will be the same for all of the valves. But as the springs 108 for the different bellows are of different strengths, the change in air-tension, corresponding to the change in position at which the valves 83 open, will be different for the different mechanisms 41, 42, 43, 44 and 45.

For selectively closing the ports 28, 29,

30 and 31, for varying the pressure in the "nd-chest, the music-roll 114 is provided 1 .th suitable 1 ri orations for selectively effecting the closing of the valve-mechanisms 32, 33, 34 and Thus, if it is desired to bring the air-admission-controller 42 into operation to control the pressure of the air in the action wind-chest, the music-roll 114 is provided with a perforation through which air is admitted to the conduits 65 and GO to cause the corresponding pneumatic 57 and valve to be raised to admit air to the conduit to cause the valve-mechanism 32 to close the port 28.

In a similar manner, any one of the controliers 41, 48, 44 or 45 can be brought into operation.

The same effects may be secured by operating the slide-valve 3 by means of the lever to selectively admit air to the ports 69, 70, 7'1 or T2 and th manually control the operation of the corresponding pneumatics 57 and valves By this method of controlling the admission of air to the valve-mechanisms I32, and the desired air-admissioncontroller may be brought into operation and the desired degree of rarelaction of the air in the action wind-chest be obtained under manual control.

Having thus descril my invention, what 1 claim as new and desire to secure by Letters Patent is:

1. A device for controlling air-pressure, comp ifng plurality of chambers, each provided with a movable wall, means affording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of raretlfaction oi the air, atmospheric air-inletineans, valve-means controlling said air-inlet-means and separately controllable by the movable walls of suit chambers, and means for controlling the operation of one or more of the movable walls.

2. A device for controlling air-pressure, comprising a plurality of chambers, each rovided with a movable wall, means afl'ordng communication between each of said hampers and a producer of rarefied air,

means whereby the position of each movable faction of the air, atmospheric air-inletmeans,'valve-means controlling said air-1nlet-means and separately controllable by the movable walls of said chambers, and means for selectively controlling the operation or one or more of the movable walls.

4:; ii torcontrollingair-pressure, comprising a plurality of chambers, each provided with a movable wall, means-affording communication between each of said chambers and a producer oi rarefied air, means whereby the position ot each movable wall varies according to the degree of rare faction of the air, atmospheric air-inletmea-ns, valve-means controlling said air-inlet-means and separately controllable by the movable walls of said chambers, and sheet-- controlled mean selectively controlling; the operation of one or more ot the movable walls.

5. i idevice for controlling; air-pressure, comprising a plurality of chambers, each provided with a movable wall, means affording communication between each of said chambers and a producer of rarefied air, means whereby the position or each movable wall varies according to the degree of rare-"' faction of the air, atmospheric air-inletmeans, valve-means controlling said air-inlet-means and separately controllable by the movable walls or" said chambers, and valvemeans for controlling the communication between one of said chambers and the producer of rarefied air.

'6. A, device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means ailord- 'inb; communication between each of said.

a rchambers and producer ot rarened air,

means whereby the position of each movable wall varies according to the degree of rarefaction of the air, atmospheric air-inletmeans, valve-means controlling said air-inlet-means and separately controllable by the movable walls of said chambers, and sheetcontrolled valve-means for controlling the communication between one of said chambers, and the producer or rarefied air.

7. A device for controllingair-pressure, comprising a plurality of chambers, each provided with a movable wall, means ail-0rd ing communication between each of said chambers and a'producer or rarefied air, means whereby the position of each movable wall varies according to the de ree of rare- .taction of the air, atmosphe; c air-inletineans, valve-means controlling said air-inletaneans and separately controllable by the movable walls of said chambers and a second valve-means for controlling said air-inletmeans.

-8. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means afl0rding communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rare faction oi? the air, atmospheric air-inletmeans, valve-means controlling said air-inlet-means and separatel controllable by the movable walls oi said chambers, and sheetcontrolled valve-means for controlling said air-inlet-nieans.

9. A device for controlling air-pressure, com sing a plurality of chambers, each provided with a movable wall, means ail'ording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of raretaction oi the air, atmospheric air-inletmeans, valve-means controlling said air-i11 let-means and separately controllable by the movable walls of said chambers, and valvemeans for selectively controlling the communication between one or more of said chambers and the producer of rarefied air.

10. A device forcontrolling air-pressure, comprisinga plurality of chambers, each provided with a movable wall, means altfording communication between each one of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rareii'action oi the air, atmospheric airinlet-means, valve-means controlling said et-means and separately controllable by the movable walls of said cl embers, and sheet-controlled valve-means for selectively controlling the communication between one or more of said chambers and the producer of rarefied air.

11. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means atfording communication between each oil? said chambers and a producer oi rarefied air, means whereby the position of each movable wall varies according to the degree of rarei'action of the air, a plurality oi at mospheric air-inlets, valve-means controlling said air-inlets and separately controllable by the movable walls of said chambers, and a second valve-means for selectively con trolling said air inlets.

12. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means fording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according; to the degree of rareiaction of the air, a plurality of atmospheric air-inlets, valve-means controlling said air-inlets and separately controllable by the movable walls of said chambers, and sheet-controlled valve-means for selectively controlling said air-inlets.

13. A device for controlling air-pressure,

comprising a plurality of chambers, each provided with a movable wall, means atfording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of raret'action of the air, a plurality of atmospheric ports, one for each of said chambers, a valve for each of said ports, each controlled by one of the movable walls, and a valve for controlling the communication between one of said chambers and the producer of rarefied air.

14. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means affording communication between each of said chambers and producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rarefaction of the air, a plurality or at mospheric ports, one for each of said chambers, a valve for each of said ports, each controlled by one of the movable walls, and a sheet-controlled valve for controlling the communication between one of said chambers and the producer of rarefied air.

15. A device for controlling air-pressure, comprising a chamber provided with a movable wall, means ailording communication between said chamber and a producer of rarefied air, means whereby the position or the movable wall varies according to the degree oi' rarei'artion of the air, an atmospheric port in communication with said chamber, a valve controlling said port and controlled by the movable wall, and tli'fi for controlling the communication be said chamber and the producer of rarefied air.

16. A devite for controlling air-pressure, comprising a chamber provided with a movable wall, means ail'ording communication between said chamber and a producer of rarefied air, means whereby the position of the movable wall varies according to the degree of raret'action oi the air, an atmospheric port in communication with said chamber, a valve controlling said port and controlled by the movable wall, and a sheetcontrolled valve for controlling the communication between said chamber and the producer of rarefied air.

1'? A device for controlling air-pressure, comprising a chamber provided with a movable wall. means affording communication between said chamber and a produer oi rarefied air. means whereby the position of the movable wall varies according to the degree of rareiaction of the air, an atmospheric port ommunication with the pro ducer o'l" rarefied air, valve controlling said port and controlled by the movable wall, and a sheet-controlled valve for controlling the communication between said chamber and the producer of rarefied air.

18. A device for controlling air-pressure, comprising a chamber provided with a movable wall, means afi'ording communication between said ciamber and a producer of rarefied air, means whereby the position of the movable wall varies according to the degree oi lll'QfzlCtiOl] of the air, an atmospheric port in communication with the producer of raref ed a.".', a valve controlling said port and controlled by the movable wall, and a valve for controlling the communication between said port and the pro ducer of rarefied air.

19. A device for controlling air-pressure, comprising a chamber provided with a movable wall, means affording communication between said chamber and a producer of rarefied air, means whereby tlr position of the movable wall varies according to the degree of rarel action oi the air, an atmospheric port in communication with said chamber, a valve controlling said port and controlled by the movable wal., and valvemeans for controlling the operation of said valve.

20. A device for controlling air-pressure, comprising a chamber provided with a movable wall, means aflording communication between said chamber and a producer of rarefied air, means whereby the position of the movable all varies according to the degree of rarelaction of the air, an atmospheric port in communication with the producer of rareiied air, a valve controlling said port and controlled by the movable wall, and a sheet-controlled valve for controlling tle communication between said port and the producer of rarefied air.

21. A device for controlling ai.rpressure, comprising a plurality of chambers,

eacn provided with a movable wall, means atit'ording communication between each of said chambers and a producer of rarefied air, means whereb the position of Qflill movable wall varies according to the degree of rarefaetion oi the air, atmospheric airinlet-means, valve-means controlling said air-inlet-means and sepm'ately controllable by the movable walls of said chainiers, and valve-means for controlling the operation of: said valve-means.

22. A device for cntrolling air-pressure. comprising a chamber pro .lClOtl with a mov able wall, means allordin communication between said chamber anf a producer of rarefied air, Tillfi'fibf the poi 'ion oi the movable wall varies according to the degree of rareiiaction of the air, an atmospheric port in communica n with said chamber, a valve controlling said port, means whereby the wall in its movement causes said valve to open said port, and adinlet-means, a -lurality or valve-means for controlling said air-inlet-means and separately controllable b the movable walls of said chambers, and valve-means tor selectively controlling the operation of one or 7 more of said valve-means.

24:. A device for controlling pressiu'e, comprising a chamber provideo with. a movable wall, means aliording communication between said chamber and a producer or"; rarefied air, means whereby the position of the movable wall varies according to the degree of rarefaction or the air, an atmospheric port in communication with the producer of rarefied air, a valve controlling said port, means whereby the wall in its movement causes said valve to open said port, and adjustable settingmeans through which the device may be set so that the movable wall will cause said valve to open said port at any predetermined one of a plurality of difiierent positions of the movable wall.

25, A device for controlling air-pressure, comprising a chamber provided with a movable wall, means ail ording communication between said (hamber and a producer of rarefied air, means whereby the position of the movable wall varies according to the degree of rarefaction of the air, an atmospheric port in communication with the pro ducer of rarefied air, a'valve controlling said port, means whereby the rail inits movement causes said valve to open said port. adjustable setting means through which the device may be set so that the mov-, able wall will cause said valve to open said port at different degrees of rareitaction of :the air, and means for holding saic. setting means in any one of a plurality of diner nt positions.

26. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means affording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rarefaction of the air, an atmospheric port for each of said chambers in communication with the source of rarefied air, a pluralityor" valves, one for each port, means whereby each wall in its movement causes one of said valves too'pen its port, adjustable setting-means through which the de vice may be, set so that the respective mov able wall will cause said one oi said valves to open its port at different degrees of rarefaction of the air, and means for holding said setting-means in any one of a plurality of different positions.

27. A device for controlling air-pressure. comprising a chamber provided with a movable wall, means affording communication between said chamber and. a producer of rarefied air, means whereby the position of the movable wall varies according to the degree of rarefaction of the air, an atmospheric port in communication with said chamber, a valve controlling said port, means whereby the wall in its movement causes said valve to open said port, adjustable setting-means through which the device may be set so that the movable wall will cause said valve to open said port at different degrees of rarefaction of the air, and means for holding said setting-means in any one of a plurality of dillerent positions.

.28. A device for controlling air-pressure, comprising a chamber provided with a movable wall, means atfording communication between said chamber and a producer of rarefied air,'means whereby the position of the movable wall varies according to the degree of raretaction of the air, an atmospheric port in communication with the producer oi rarefied air, a valve controlling saidport, means whereby the wall in its movement causes said valve to open said port, adjustable setting-means which the device may be set so that the movable wall willcause said valve to open said port at any predetermined one of a plurality of different positions of the movable wall, and means for holding said settingmeans in any one of a plurality of different positions.

29. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a which the device may be set so that the.

respective movable wall will cause said one of said valves to open its port at any predetermined one of a plurality of different positions of the movable wall, and means for holding said setting-means in any one of a plurality of difierent positions.

through movable wall, means at fording communication between each of 30. A device for controlling air-pressure for musical instruments, comprising a plurality of chambers, each provided with a movable wall, means affording communication between each one of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rarefaction of the air, a plurality of atmospheric ports, one for each or said chambers, a plurality of valves, one for each of said ports, and means whereby each wall in its movement causes one of said valves to open its port; each of said valves controlling the pressure for the same playing mechanism.

31. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means affording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rarefaction of the air, a plurality of atmospheric ports, one for each of said chambers, a plurality of valves, one for each of said ports, means whereby each wall in its movement causes one of said valves to open its port, and adjustable setting-means through which the device may be set so that each movable wall will cause one of said valves to open its port at dilferent degrees of rarefaction of the air.

32. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means affording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rarefaction of the air, a plurality oiatmospheric ports, one't'or each of said chambers, a plurality of valves, one for each of said ports, means whereby each wall in its movement causes one of said valves to open its port, and adjustable setting-means through which the device may be set so that each movable wall will cause one of said valves to open its port at a different degree of rarefaction of the air from that at which another movable wall causes the opening of its port.

A device for controllin air-pressure, comprising a plurality of chambers, each provided with a movable wall, means affording communication between each of said chambers and a producer of rarefied air, meanswhereby the position or" each movable wall varies accoruing the degree of rarefaction of the air, a plurality of atmospheric ports, one for each of said chambers; a plurality of valves one for each of said ports, means whereby each wall in its movement auses one or said valves to openits port, and-adjustable setting-means through which the device Y be set so that each movable wall will cause one of said valves to open its port at any one or a plurality of different degrees of rarei action of the air; said setting-means being constructed to control said 'alves collectively.

34-. A device for controlling air-pressure, omprisiug a plurality of chambers, each provided with a movable wall; means afford lug communication between each of said chambers and proeucer oi? rarefield air; means whereby the position of each movable wall varies according to the degree of rarefaction of the air; a plurality of atmospheric r :ts, one for each of said chambers; a plurality oi valves, one 'for each of said ports; 11612115 whereby each wall in its movement can es one of cvalves to open its port; aagustable settn g means through which the deviz e may be set that each movable wall will cause one of said valves to open its port it any one of a plurality or" dilterent degrees of rare'faetion of the air, said settingmeans oeing constructed to control said valves collectively; and a valve for controlling the communication b tween one of said chambers and the producer of rarefield air.

A device for controlling air-pressure, comprising a plurality chambers, each provided with a movable wall; means affording communication between each of said chambers and producer or rarefied air; means whereby the position of each movable wall varies according to the degree of rarefaction of the air; atmospheric air-inlet mean a plurality of valve-means controlliz :5 said air-inlet means controlled by the movable walls of said chambers; adjustable setting-means through which the device may be set so that each movable wall will cause one of said valve-means to open said airinlet means at any one of a plurality of different degrees of raretaction oi the air, said setting-means being constructed to control said valve-means collectively; and a second valve-means for controlling said air-inletmeans.

36. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall; means afi'ording communication between each of said chambers and a producer of rarefied air; means whereby the position of each movable wall varies according to the degree of rarefaction of the air; atmospheric air-inletmeans; a plurality of valve-means controlling said air-inlet-means controlled by the movable walls of said chambers; adjustable setting-means through which the device may be set so that each movable wall will cause one of said valve-means to open said airinlet means at any one of a plurality of different degrees of rarefaction of the air, said setting-means being constructed to control means; a plurality of valve-means controlling said air-inletmeans controlled by the movable walls of said chambers; adjustable setting-means through which the device may be set so that each movable wall will cause one of said valve-means to open said airinlet means at any one of a plurality of different-degrees of rareiaction of the air, said setting-means being constructed to control said valve-means individually; and a second valve-means for controlling said air-inlet means.

38. A. device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall; means atfording communication between each of said chambers and a producer of rarefied air; means whereby the position of each movable wall varies according to the degree of raret'action of the air; a plurality of atmospheric ports, one for each of said chambers; a plurality of valves, one foreach of said ports; means whereby each wall in its movement causes one of said valves to open its port; adjustable setting-means through which the device may be set so'that each movable wall will cause one of said valves to open its port at any one of a plurality of difierent degrees of rarefaction of the air, said setting-means being constructed to control said valves collectively; and a valve for controlling the communication between one of said ports and the producer of rarefied air.

"39. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means affording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rarefa'ction of the air, a plurality of atmospheric ports; one for each of said chambers, a plurality of valves,-one for each of said ports, means whereby each wall in its movement causes one of said valves to open its port, and adjustable setting-means through which the device may be set so that each movable wall will cause one of said valves to openits port at any one of a plurality of different degrees of rarefaction of the air; said setting means being constructed to control said valves individually.

4-0. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall; means affording communication between each of said chambers and a producer of'rarefied air; means whereby the position of each movable wall varies according to the degree of rarefaction of the air; a plurality of atmospheric ports, one for each of said chambers; a plurality of valves, one for each of said ports; means whereby each wall in its movement causes one of said valves to open its port; adjustable setting means through which the device may be set so that each movable wall will cause one of said valves to open its port at any one of a plurality of different degrees of rarefaction of the air. said setting-means being constructed to control said valves individually; and a valve for controlling the communication between one of said chambers and the producer of rarefied air.

41. A device for controlling air-pressure, comprising a bellows having a movable leaf, means affording communication between said bellows and a producer of rarefied air, means whereby the position of said movable leaf varies according to the degree of rarefaction of said air, an atmospheric port carried by the movable leaf and communicating with the interior of said bellows, a valvemember pivotally mounted on the movable leaf for controlling said port. and an adjustable fulcrum-member for controlling the movement of said valve-member.

42. A device for controlling air-pressure, comprising a plurality of bellows, each having a movable leaf; means affording communication between each of said bellows and a producer of rarefied air; atmospheric ports, one communicating with the interior of each of said bellows, respectively; a plurality of valve members, one pivotally mounted on each movable leaf. for controlling said atmospheric ports; and adjustable "fulcrum-means for controlling the movement of said valve-members collectively.

4C3. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means afiording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rarefaction of the air, a plurality of atmospheric ports. one for each of said chambers, a plurality of valves, one for each of said ports, and means whereby each wall in its movement causes one of said valves to open its port; said device being constructed so that the respective ports will be opened under difierent degrees of rarefaction or air.

44;. A device for controlling air-pressure, comprising a plurality of chambers; each provided with a movable wall, means afiording communication between each of sald chambers and a producer of rarefied air;

means whereby the position of wall varies according to the faction of the air; a plurali pheric ports. one for each of said chambers; a plurality of valves one for each of said ports; means whereby each wall in its movement causes one or" said valves to open its port, said devio being constructed so that the respective ports will be opened under different degrees or" rarelaction of air; and a valve for controlling communication between one of: said chambers and the producer of rarefied air.

925. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall; means atfording communication between each oi? said chambers and a producer of rarefied air; means whereby the position of" each movable wall varies according to the degree of rarcfaction of the air; plurality of atmospheric ports communicating with t e producer of rarefied air, one for each of said chambers, a plurality of valves one for each of said ports; means whereby each wall in its movement causes one of said valves to open its port, said device being constructed so that the respective ports will be opened under different degrees of rare-faction of air; and a valve for controlling communication between one of said ports and the poducer of rarefied air.

46. A device for controlling air-pressiu'e, comprising a plurality of chambers, each provided with a movable wal means ailording communication between each of sad chambers and a producer of rarefied air; means whereby the position of each movable wall varies according to the deg cc of rare faction of the air; a plurality of atmospheric ports communicating wi h the producer oi rarefied air, one for each of said chambers; a plurality of valves one for each of said ports; means whereby each wall in its movement causes one of said valves to open its port, said device being constructed so that the respective ports will be opened under different degrees of rare faction of air, and a sheet controlled valve for controlling communication between one of said ports and the producer of rarefied air. 7

47. A device for controlling air-pressure, comprising a chamber provided with-a movable wall, means affording communication between said chamber and a producer of rarefied air, means whereby the position of the movable wall v rics according to the degree of rarel action of the air, an atmospheric port in communication witi the producer of rarefied air, a valve controlling said port and controlled by the movable wall, and controlling-means between said port and the producer of rarefied air for pheric ports, one for each of said chambers;

a valve for each of said ports, each con-- trolled by one of the movable walls; and controlling-means for rendering one of said ports inoperative to supply air to the producer of rarefied air.

49. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall; means afl'ordcommunication between each of said chambers and a producer of rarefied air; means whereby the position of each movable wall varies according to the degree of rarefaction of the air; a plurality of atmospheric ports, one for each of said chambers; a valve for each of said ports, each controlled by one of the movable walls; and sheet-controlled controlling-means for rendering one of said ports inoperative to supply air to the producer of rarefied air.

50. A device for controlling air-pressure, comprising two chambers; means affording communication between one of said chamhers and a producer of rarefied air; a port attording communication between said chambers; a valve controlling said port; two atmospheric ports, one communicating with each of said chambers; two valves, one for each of said atmospheric ports, two movable members, one for controlling each of said two valves, and means whereby the position of said movable members varies with the degree ot' rare'faction of the air.

51. A device for controlling air-pressure, comprising two chambers; means affording communication between one of said chambers and a producer of rarefied air; a. port affording communication between said chambe s; a valve controlling said port; two bellows, one in communication with each of said chambers; two atmospheric ports, one communicating with each of said chambers; and a valve "for each of said atmospheric ports, one controlled by each of said bellows.

A device for controlling air-pressure, comprising two chambers; means altording communication between one of said chambers and a producer of rarefied air; a port affording communication between said clram crs; a valve controlling said port; a pneumatic controlling said valve; two bellows, one in communication with each of said chambers, two atmospheric ports, one communicating with each of said chambers,

5 ing-member.

54. A device for controlling air-pressure, comprising a bellows having a movable leaf, means aifording communication between said bellows and a producer of rarefied air,

means whereby the position of the movable leaf varies according to the degree of rarefaction of the air, an atmospheric port carried by the movable leaf and communicating with the interior of said bellows, a valve member pivotally mounted on the movable leaf for controlling said port, an adjustable fulcrum member for controlling the movement of said valve-member, and spring means for holding said valve member against said fulcrum-member.

55. A valve-mechanism comprising a pivoted valve, a pivot-post on which said valve is mounted, and a compression-member, extending between the outer portionof said pivot-post and the free end of said valve, and reacting laterally on said pivot-post and inwardly and away from said pivotpost on said valve.

56. A valve-mechanism comprising a pivoted valve, a pivot-post on which said valve is mounted, and a spring compression-member, extending between the outer portion of said pivot-post and the free end of said valve, and reacting laterally on said pivotpost and inwardly and away from said pivotpost on said valve.

7 57. A valve-mechanism comprising a pivoted valve-member; a pivot-post; and a spring-member, comprising a spring compression-portion extending between the outer portion oi said pivot-post and the free end of said valve-member and reacting laterally on said pivot-post and inwardly and away from said pivot-poston said valve-member,

anda portion extending from said pivotpost on the side opposite from said co1npression portion and reacting inwardly on said valve-member and outwardly on said pivotost. p 58. A device for controlling air-pressure for musical instruments, having means for controlling air-pressure at any one of a plurality of predetermined, selectable individually different degrees, and means for adjusting said device to vary individually, with relation to each other, and collectively,

as a whole, the degrees of air-pressure controlled thereby, the collective adjustment affecting the individual degrees of air-pres sure differently.

59. A device for controlling air-pressure for musical instruments, having means for controlling air-pressure at any one of a plurality of predetermined, selectable individually different degrees, means for adjusting said device to vary individually, with relation to each other, the different degrees of air-pressure-control, and other means for adjusting said device to vary collectively, as a whole, the difi'erent degrees of air-pressure-control, the collective adjustment affecting the individual degrees of air-pressure differently.

60. A device for controlling air-pressure for musical instruments, comprising individual regulator-units capable of controlling air-pressure at individually different degrees, and means for separately and collectively adjusting said individual regulator-units and the degrees of air-pressure controllable thereby.

61. A device for controlling air-pressure for musical instruments, comprising individual regulator-units capable of controlling air-pressure at individually dilierent degrees, means for separately adjusting said individual regulator-units and the degrees of air-pressure controllable thereby, and other means for collectively adjusting said individual regulator-units and the degrees of air-pressure controllable thereby.

62. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means aiiording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rarefaction of the air, a plurality of atmospheric ports, one for each of said chambers, a plurality of valves, one for each of said ports, means whereby each wall in its movement causes one of said valves to open its port, and adjustable setting-means through which the device may be set so that, compared with each other, the movable walls will cause the opening of their respective ports at different degrees of rarefaction of the air, and so that each movable wall will cause the opening of its port at any predetermined one of a plurality of different positions of the movable wall.

63. A device for controlling air-pressure, comprising a chamber provided with a movable wall, means afliording communication between said chamber and a producer of rarefied air, means whereby the position of said movable wall varies accordlng to the degree of rareiaction of the air, an atmospheric port in communication with the producer of rarefied air, a valve controlling said port, means whereby the wall in its movement causes said valve to open said port, adjustable means through which the device may be set so that the movable wall will cause said valve to open said port at different degrees of rarefaction of the air, and other adjustable means through which the device may be set so that the movable wall will cause said valve to open said port at any predetermined one of a plurality of different positions of the movable wall.

64. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means affording communication between each of said chambers and a ,producerof rarefied air, means whereby the position of each movable wall varies according to the degree or rarefaction of the air, a plurality of atmospheric ports, one for each of said chambers, a plurality of valves, one for each of said ports, means whereby each wall in its movement causes one of said valves to open its port, adjustable means through which the device may be set so that, compared with each other, the movable walls will cause-the opening of their respective ports at different degrees of rarefaction of the air, and other adjustable means through which the device may be set so that each movable wall will cause the opening of its port at any predetermined one of a plurality of different positions of the movable wall.

65. A device for controlling air-pressure, comprising a chamber provided with a movable wall, means affording communication between said chamber and a producer of rarefied air, means whereby the position of the movable wall varies according to the degree otrarefaction of the air, an atmospheric port in communication with the producer of rarefied air, a valve controlling said port, means whereby the wall in its movement causes said valve to open said port, and adjustable means through which the device may be set so that the movable wall will cause said valve to open said port at any predetermined one of a plurality of different positions of the movable wall at different degrees of rarefaction of the air.

66. A device for controlling air-pressure, comprising a chamber provided with a mov able wall, means affording communication between said chamber and a producer of rarefied air, means whereby the position of the movable wall-varies according to the degree of rarefaction of the air, an atmospheric port in communication with said chamber, a valve controlling said port and controlled by the movable wall, and means for controlling the operation of said valve.

67. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means affording communication between each of said chambers and a producer of rarefied air,

means whereby the position of each movable wall varies according to the degree of rarefaction of the air, atmospheric air-inletmeans, valve-means controlling said air-inlet-means and separately controllable by the l chambers, and. means movable walls oi said for controlling the operation of said valve means.

68. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means atl'ording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rarefaction of the air, atmospheric air-inletmeans, valve-means controlling said airinlet-means and separate y controllable by the movable walls of said chambers, and sheetcontrolled means for controlling the operation of said valve-means.

69. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means affording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rarefaction of the air, atmospheric air-inlet-means, a plurality of valve-means controlling said air-inlet-means and separately controllable bythe movable walls of said chambers, and means for selectively controlling the operation of one or more of said valve-means.

TO. A device for controlling air-pressure, comprising a plurality of chambers, each provided "ith a movable wall, means affording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rarefaction of the air, atmospheric air-inletmeans, a plurality of valve-means controlling said air-inlet-means and separately controllable by the movable walls of said chambers, and sheet-controlled means for selectively controlling the operation of one or more of said valve-means.

71. A device for controlling air-pressure, comprising a plurality of chambers, each provided with a movable wall, means atfording communication between each of said chambers and a producer of rarefied air, means whereby the position of each movable wall varies according to the degree of rarefaction of the air, a plurality of atmospheric ports, one for each of said chambers, a plurality of valves, one for each of said ports, means whereby each wall in its movement causes one of said valves to open its port, and adjustable means through which the device may be set so that, compared with each other, a plurality of the movable walls will cause the opening of their respective ports at relatively similar positions but at different predetermined degrees of rarefaction of the air, each of which positions may be any predetermined one of a plurality of different positions of said movable walls.

72. A device for controlling air-pressure, comprising a chamber provided with a movable wall, means affording communication between said chamber and a producer of rarefied air, means whereby the position of the movable wall varies according to the degree of rarefaction of the air, an atmospheric port in communication with said chamber, a valve controlling said port and controlled by the movable wall, and means for controlling the operation of the movable Wall.

73. A device for controlling air-pressure, comprising a chamber provided with a movable wall, means affording communication between said chamber and a producer of rarefied air, means whereby the position of the movable wall varies according to the degree of rarefaction of the air, an atmospheric port in communication with said chamber, a valve controlling said port and controlled by the movable wall, and sheet controlled means for controlling the operation of the movable wall.

74:. A device for controlling air-pressure for musical instruments, comprising a plurality of regulators, each comprising a chamber having a movable wall and a valve controlled by the wall; means for controlling the chambers individually; and means for controlling the valves collectively.

75. A device for controlling air-pressure for musical'instruments, comprising a plurality of regulators, each comprising a port, a valve for controlling the port, and a chamber having a movable wall for controlling the valve; and means for individually controlling the ports and for collectively controlling the valves.

76. A device for controlling air-pressure vfor musical instruments, comprising a plurality of regulators, each comprising an atmospheric port and a valve for controlling the port; and means for individually controlling the ports and for collectively controlling the valves.

77. A device for controlling air-pressure lators, the collective adjustment affecting the individual degrees of air-pressure differently.

79. A device for controlling air-pressure for musical instruments, comprising a plurality of regulators for controlling the admission of atmospheric air, and means for adjusting said device to vary collectively the degrees of air-pressure controlled by said regulators.

80. A device for controlling air-pressure for musical instruments, comprising a plurality of regulators for controlling the admission of atmospheric air to cause diiieu ent degrees of air-pressure respectively, and means for adjusting said device to vary collectively the degrees of air-pressure controlled by said regulators, the collective adjustment affecting the individual degrees of air-pressure differently.

81. A. device for controlling air-pressure for musical instruments, comprising a plurality of regulators, each comprising a chamber having a movable wall and a valve controlled by the wall, and means for controlling the valves collectively.

In witnesses whereof, I have hereunto subscribed my name.

' J. CLARKE HAGEY. 

